©2003 Fairchild Semiconductor Corporation
www.fairchildsemi.com
Rev.1.0.4
Features
• Fixed Frequency
• Internal Burst Mode Contr ol ler for Stand- by Mode
• Pulse By Pulse Over Current Limiting
• Over Current Protection(Auto Restart Mode)
• Over Voltage Protection (Auto Restart Mode)
• Over Load Protection(Auto Restart Mode)
• Internal Thermal Shutdown Function(Latch Mode)
• Unde r Voltage Lo ck ou t
• Internal High Voltage Sense FET
•Soft Start
Application
• LCD Monitor SMPS
• Adaptor
Description
The Fairchild Power Swit ch(FPS) product family is speci ally
designed for an off line SMPS with minimal external
components. The Fairchild Power Switch(FPS) consist of a
high voltage power SenseFET and a current mode PWM IC.
Included PWM controller features int egrated fixed oscillator,
the under voltage lock out, the leading edge blanking, the
optimized gate turn-on/turn-off driver, the thermal shutdown
protection, the over voltage protection, and the temperature
compensated precision current sources for the loop
compensation and a fault protection circ uitry. compared with
a discrete MOSFET and a controller or a RCC switching
converter solution, a Fairchild Power Switch(FPS) can
reduce total component count, design size, and weight and at
the same time increase efficiency, productivity, and system
reliability. It has a basic platform well suited for the cost
effective LCD monitor power supply.
TO-220F-5L
1
1. Drain 2. GND 3. VCC
4. Feedback 5. S oftStart
Internal Block Diagram
S
R
Q
S
R
QS
R
QTSD
(Tj=160 ℃)
Ifb
1
11
13
33
3
5
55
5
4
44
4
2
22
2
Vref
Rsenese
2.5R
R
Vref
Internal
Bias Vref
UVLO
Ron
Roff
PWM
OCL
Burst mode
controller
Filter
(130nsec)
Power-on
Reset
(Vcc=6.5V)
UVLO Reset
(Vcc=9V)
OLP
OVP
Vth=7.5V
Vcc
Vth=33V
Vth=2V
Vfb Offset
Idelay
Vcc
Vfb
Vth=1V
Vcc
Vth=11V/12V
OSC
Vref
Drain
V
CC
GND
SoftStart
Feedbock
FS6M07652RTC
Fairchil d Power Swi tch(FPS)